I will not be able to address your arguments one-by-one without rewriting chapters of Huemer's book. I would recommend that you or anyone else interested in these points read the book and/or the numerous discussions he has had online with other academics.

It will be very difficult for you to come up with off-the-cuff arguments which will best a book written by an experienced philosopher over more than a year, and you are unlikely to win over anyone who agrees with Huemer in this forum for exactly that reason. If you wish to discredit him, I suggest you find an academic who has written a thoughtful critique of "The Problem of Political Authority", or that you write a book or paper on its flaws. Anything short of that is most likely to be self-satisfying but ineffective rhetoric.